# 变量赋值
# a = 2
# b = 2
# 链式赋值
# a = b = 2
# print(a, b)
# a = 3
# print(a, b)

# alist = blist = [2, 3]
# print(alist, blist)
# alist.append(4)
# blist.append(5)
# print(alist, blist)

# 解构赋值
# a, b = 1, 2
# print(a, b)
# s1, s2 = 'mn'
# print(s1, s2)
# first, last = ['尼古拉斯', '科鲁奇']
# print(first, last)
# 交换两个变量的值
n1, n2 = 1, 2
# c = n1
# n1 = n2
# n2 = c
n1, n2 = n2, n1
print(n1, n2)



